What technique is used to estimate body fat percentage based on mass and volume ratio?

What technique is used to estimate body fat percentage based on mass and volume ratio?

• A. Skin fold caliper testing
• B. Bioimpedence testing
• C. Densitometry
• D. Flexibility test

Answer: (C)

Densitometry is a technique used to estimate body fat percentage by assessing the mass and volume of a person's body. This method operates on the principle of density, which is calculated by dividing mass by volume. In densitometry, body density is typically measured through hydrostatic weighing or air displacement plethysmography. Hydrostatic weighing involves submerging a person in water and measuring underwater weight to determine body volume; since fat tissue is less dense than lean tissue, the relative volumes can reveal body fat percentage. Air displacement plethysmography uses similar principles but measures the amount of air displaced by a person's body in a closed chamber. These methods provide a direct measurement of body composition, allowing for a more accurate calculation of body fat percentage compared to other techniques, which may rely on estimates or calculations from surface measurements. Skin fold caliper testing and bioimpedence testing are also common methods for estimating body fat percentage, but they are generally less precise than densitometry. Skin fold caliper testing measures the thickness of skin folds at various sites on the body, providing indirect estimates. Bioimpedence testing measures the resistance of body tissues to an electrical current, which can vary based on hydration levels and other factors, making it

Densitometry is a technique used to estimate body fat percentage by assessing the mass and volume of a person's body. This method operates on the principle of density, which is calculated by dividing mass by volume. In densitometry, body density is typically measured through hydrostatic weighing or air displacement plethysmography.

Hydrostatic weighing involves submerging a person in water and measuring underwater weight to determine body volume; since fat tissue is less dense than lean tissue, the relative volumes can reveal body fat percentage. Air displacement plethysmography uses similar principles but measures the amount of air displaced by a person's body in a closed chamber.

These methods provide a direct measurement of body composition, allowing for a more accurate calculation of body fat percentage compared to other techniques, which may rely on estimates or calculations from surface measurements.

Skin fold caliper testing and bioimpedence testing are also common methods for estimating body fat percentage, but they are generally less precise than densitometry. Skin fold caliper testing measures the thickness of skin folds at various sites on the body, providing indirect estimates. Bioimpedence testing measures the resistance of body tissues to an electrical current, which can vary based on hydration levels and other factors, making it